Steam-engine.



E. J. ARMSTRONG.

STEAM ENGINE.

APPLIOATION TILED JUNE 17, 1911.

In L\ a m 4 Q wi/mwm 6 W 147. NW dew/01mm.

COLUMBIA PMNOGRAPH CO.,WASHINGTON. D C.

Patented June 11, 1912.

2 SHEETS-SHEET 1.

E. J. ARMSTRONG.

STEAM ENGINE.

APPLICATION FILED mm 17,1911.

1,029,253, Patented June 11,1912.

2 SHEETS-SHEET 2.

QXWWLMQM 03M M. 4m g' QOLUMIUA PLANOGRAPH CO.,\\'ASHINGTON, n. c.

EDWIN J. ARMSTRONG, OF ERIE, PENNSYLVANIA.

STEAM-ENGINE.

Specification of Letters Patent.

Patented June 11 1912.

Application filed June 17, 1911. 'Serial No. 633,746.

T 0 all whom it may concern:

Be it known that I, EDWIN J. AnMs'rRoNe, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Steam-Engines, of which the following is a specification.

This invention relates to steam engines,

and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims.

It is well understood that a considerable loss of power in steam engines is due to the absorption of heat by the walls of the cylinder and moisture in the cylinder.

The object of this invention is to clear the cylinder of all moisture so as to remove, as far as possible, the loss incident to the absorption of heat by moisture in the cylinder. This loss by the absorption of heat by moisture or water in the cylinder is due to the taking up of heat by the water with the incoming steam and the consequent condensation of some of this steam with resulting loss of energy. Upon the reduction of pressure by the expansion of steam, or the exhaust of the steam some of this water which is condensed under the higher pressure, revaporizes upon the release of pressure so that the losses incident to the retention of moisture or water in the cylinder is larger than is ordinarily understood. The losses incident to this retention of moisture in the cylinder is more pronounced with engines controlled with a single valve, or valves which control both the exhaust and the admission of steam.

The invention is illustrated in the accompanying drawings as follows:

Figure 1 shows a section of the engine cylinder, valve chest, ports and valve on the line 11 in Fig. 2. Fig. 2 a section on the line 2-2 in Fig. 1. Fig. 3 an elevation of the valve. Fig. 4 a face view of the valve seat and valve chest, the cover being removed.

1 marks the cylinder, 2 the valve chest, 3 the valve chest cover, 4: the steam inlet to the valve chest and 5 the engine exhaust.

The valve 6 operates on the valve face in the steam chest and is covered with the pressure plate 7 for the purpose of balancing the valve and giving a double ported effect. The main inlet port 8 is in the usual location, and conveys steam from the steam chest to the cylinder and from the cylinder to the exhaust. The pressure plate has the cavities 9 opposite the steam ports for the purpose of balancing the valve at this point and also for giving a double ported effect. The steam valve has the passages 10 so that as the edge 11 of the valve (see Fig. 1) opens on the main port 8, the edge 12 opens to the passage 9 and gives an admission movement of steam by way of the passage 10 and main port 8. In a general way, this is a common practice in engines of this type.

I provide an auxiliary exhaust port 13. This preferably leads from the bottom of the cylinder, as clearly shown in Fig. 2, and enters the valve chest in general alinement with the main valve 8 but is confined to the part of the main port nearest the exhaust port 15 and only occupies a small part of p the space at the main port and is of less length than the main port. The passage 10 is sufficiently short so that it does not operate upon the auxiliary exhaust port 13 and consequently no steam is admitted through the port 13.

In operation as the valve opens, as shown in Fig.1, steam is admitted past the end 11 of the valve, and by the end 12, passages 9 and 10, but no steam is admitted through the auxiliary port 13. This inrush of steam strikes the cylinder and swings around its wall and drives whatever moisture may be deposited in the cylinder into the auxiliary port 13. The exhaust edge 13 of the auxiliary port 13 is preferably nearer the exhaust port than the exhaust edge 8 of the main port so that the initial opening of the exhaust past the edge 15 of the valve is from this auxiliary port 13 and as a result the moisture in this exhaust port is swept out into the main exhaust.

I have shown the balancing passages 16 but these are not a suflicient distance from theedge of'the valve to uncover the auxiliary port 13 with a maximum opening of the valve.

What I claim as new is:

1. In an engine, the combination of a cylinder; a valve chest; a main steam port leading from the chest to the cylinder; a valve operating over said port for the admission and exhaust of steam from the cylinder; and an auxiliary exhaust port controlled by said valve and opening only to exhaust steam from the cylinder.

by said valve and opening in advance of and with the main port and only to exhaust steam from the cylinder.

3. In an engine, the combination of a cylinder; a valve chest; a main steam port leading from the chest to the cylinder; a valvev operating over said port for the admission and exhaust of steam from the cylinder;

and an auxiliary exhaust port controlled by said valve and opening from the bottom of the cylinder and only to exhaust steam from the cylinder.

1. In an engine, the combination of a cylinder; a valve chest; a main steam port lead ing from the chest to the cylinder; a valve operating over said port for the admission and exhaust of steam from the cylinder; and an auxiliary exhaust port controlled by said valve and opening in advance of and with the main port and only to exhaust steam from the cylinder, said auxiliary port extending from the bottom of the cylinder.

5. In a steam engine, the combination of a cylinder; a valve chest; a main steam port leading from the chest to the cylinder; a

. valve operating over said port and having passages for admitting and exhausting steam from the cylinder by way of said port; and an auxiliary port controlled by said valve and in general alinement in the face of the valve chest with the main valve port and opening only to exhaust into the samev passages in the valve as the main port.

6. In a steam engine, the combination of a cylinder; a valve chest; a main steam port leading from the chest to the cylinder; a valve operating over said port for the ad mission and exhaust of steam from the cylinder, said valve being double ported; a pressure plate on the valve having a passage operating with the double ports of the valves to make a double admission to the main port; and an auxiliary exhaust port controlled'by the valve and opening only 1 my hand in the presence of two subscribing to exhaust from the cylinder.

7. In a steam engine, the combination of a cylinder; avalv'e chest; a main steam port leading from the chest to the cylinder; a

valve operating over said port for the ad-' mission and exhaust of steam from the cyl- V inder, said valve being double ported; a

five cents each, by addressing the Commissioner Washington, D. G. 7

pressure plate on the valve having a passage operating with the double ports of the valve to make a double admission to the main port; and an auxiliary exhaust port controlled by thevalve and opening only to exhaust from the cylinder, said auxiliary port being in general alinement with the main port and exhausting into the same passages in the valve.

8. In a steam engine, the combination of a cylinder; a valve chest; a main steam port leading from the chest to the cylinder; a valve operating over 'said port for the admission and exhaust of steam from the cylinder, said valve being double ported; a pressure plate on the valve having a passage operating with the double ports of the valve to make a double admission to the main port; and an auxiliary exhaust port controlled by the valve and opening only to exhaust from the cylinder, said auxiliary port being in general alinement with the main port and exhausting into the same passages in the valve but in advance of the main port. 7

9. In a steam engine, the combination of a steam engine cylinder; a valve chest; a main steam port leading from the chest to the cylinder; an auxiliary port opening to the chest at one end of the main port and of less width than the main port; and a valve operating on said ports, said valve having a passage giving a double ported eflect to the valve, said passage being of less length than the main port and operating only on the main port.

10. In a steam engine, the combinatlon of a steam engine cylinder; a valve chest; a

main steam port leading from the chest to the cylinder; an auxiliary port opening to 'the chest at one end of the main port and of less width than the main port; and a valve operating on said ports, said valve having a passage giving a double ported "effect to the valve, said passage being of less length than the main port and operating only on the main port, the exhaust edge of the auxiliary port being slightly in ad- Vance of the exhaust edge of the main port.

In testimony whereof I have hereunto set Witnesses. I

EDWIN J. ARMSTRONG.

Witnesses: i r

W. J. YOUNG, B M. I-IARruAN.

of Patents, 

